Abstract: In a burst mode communication system bursts arrive at a receiver which must correctly acquire and track carrier and clock phases in order to recover the transmitted symbols. A burst mode receiver is used to recover the clock and carrier phase. The detection of an initiator pulse indicates the presence of a burst signal, and a cross-coupled fractionally spaced digital filter structure is used with a known preamble to perform symbol sampling phase recovery and carrier phase acquisition, and during the normal mode of operation results in a tracking of the symbol and carrier phases.

Abstract: In a burst mode communications system, bursts of information with a known preamble are transmitted from a burst mode transmitter and are received by a burst mode receiver which uses the preamble to determine the presence of a burst and to determine the correct carrier frequency, carrier phase, symbol clock frequency and symbol clock phase in order to correctly recover the symbols transmitted, and thus the information contained within the burst. The present invention comprises a method of burst transmission using a preamble which contains an initial pulse and a Barker sequence following the initial pulse separated by a dead time period equal to the transmission time of at least one symbol. The preamble can be transmitted on orthogonal carriers and the order of the Barker sequence can be reversed and multiplied by minus one on one of the carriers to reduce the probability that noise events on both carriers make the Barker sequence less detectable on each channel.